"As we announced earlier this year, for the first time
ever, we are offering the full versions of Windows 10 Home, Windows 10 Mobile
and Windows 10 Pro as a free and easy upgrade for qualifying Windows 7, Windows
8.1 and Windows Phone 8.1 devices that upgrade in the first year after
launch.** Once you upgrade, you have Windows 10 for free on that device”

Built on Windows 10 Enterprise for needs of schools and all
educational stake holders-administrators, teachers & students through
academic volume licensing. There will be paths for students with Windows 10
Home and Windows 10 pro to upgrade to Windows 10 Education.

6. Windows 10 Mobile Enterprise:

Target: Business users on mobile devices

For business customers on smart tablets and smart phones.
Available for volume licensing customers.

Incorporates latest security and innovation features when
they are available.